The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 11, 1977
Filed:
Feb. 18, 1976
Michel A Pierrat, Andover, MA (US);
Carl J Holt, Jr, Andover, MA (US);
COMPUDRIVE Corporation, North Billerica, MA (US);
Abstract
Continuous-curvature lobed cams, such as are variously used after the manner of gearing in orbital-drive mechanical transmissions, hydraulic motors and the like, are formed with the precise and continuous distinctive contouring which is essential to their successful operation by way of a simple and inexpensive cutting tool rotated about a fixed axis in a conventional machine while the cam blank with which it is in a material-removing engagement is both rotated relatively slowly in one angular direction and orbited relatively rapidly and synchronously along a circular path in the opposite angular direction. Synchronism between the slow rotary and rapid orbital motions is achieved in a machine-mounted fixture through geared drive of two rotary tables from a common motive source on the same movable platen which mounts the two rotary tables. One of the rotary tables orbits the platen along an adjustable-eccentricity path relative to the supporting machine bed, as accommodated by an X-Y mount, and the number of cam lobes to be fashioned is determined by introducing an appropriate gear in an adjustable gear train between the motive source and the other rotary table which rotates the cam blank.